The way to handle that is to use the Begin/End Select feature. Go to one end of where you want your desired selection to be. Invoke Begin/End Select (via Edit menu or shortcut keycombo). Move to the other end of the desired selection and invoke the command again. To get a column-selection, I use Shift+Alt+“an-arrow” to highlight one character (the last one in the desired selection) in a column-block BEFORE invoking the second Begin/End Select; otherwise you get a stream block which isn’t what you’ve said you wanted.